WO2022236673A1 - Procédé et appareil de détermination de livre de codes harq-ack de type 1 - Google Patents

Procédé et appareil de détermination de livre de codes harq-ack de type 1 Download PDF

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Publication number
WO2022236673A1
WO2022236673A1 PCT/CN2021/093045 CN2021093045W WO2022236673A1 WO 2022236673 A1 WO2022236673 A1 WO 2022236673A1 CN 2021093045 W CN2021093045 W CN 2021093045W WO 2022236673 A1 WO2022236673 A1 WO 2022236673A1
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Prior art keywords
pdsch reception
slot
candidate pdsch
harq
candidate
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PCT/CN2021/093045
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English (en)
Inventor
Haipeng Lei
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Lenovo (Beijing) Limited
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Priority to EP21941249.1A priority Critical patent/EP4338435A1/fr
Priority to CN202180097432.7A priority patent/CN117242797A/zh
Priority to PCT/CN2021/093045 priority patent/WO2022236673A1/fr
Publication of WO2022236673A1 publication Critical patent/WO2022236673A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint

Definitions

  • Embodiments of the present disclosure generally relate to wireless communication technology, and more particularly to hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook determination.
  • HARQ-ACK hybrid automatic repeat request acknowledgement
  • Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, messaging, broadcasts, and so on.
  • Wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power) .
  • Examples of wireless communication systems may include fourth generation (4G) systems, such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may also be referred to as new radio (NR) systems.
  • 4G systems such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may also be referred to as new radio (NR) systems.
  • a user equipment may monitor a physical downlink control channel (PDCCH) in one or more search spaces.
  • the PDCCH may carry downlink control information (DCI) , which may schedule uplink channels, such as a physical uplink shared channel (PUSCH) , or downlink channels, such as a physical downlink shared channel (PDSCH) .
  • DCI downlink control information
  • the UE may transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback (e.g., HARQ-ACK information bit (s) ) for the PDSCH through a PUSCH or a physical uplink control channel (PUCCH) .
  • HARQ-ACK hybrid automatic repeat request acknowledgement
  • the PUCCH may carry a HARQ-ACK codebook including the HARQ-ACK feedback information bit (s) for the PDSCH.
  • Some embodiments of the present disclosure provide a method for wireless communication performed by a user equipment (UE) .
  • the method may include: determining that hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for a physical downlink shared channel (PDSCH) on each candidate PDSCH reception occasion of a first plurality of candidate PDSCH reception occasions and HARQ-ACK feedback for a PDSCH on each candidate PDSCH reception occasion of a second plurality of candidate PDSCH reception occasions are to be multiplexed in a physical uplink control channel (PUCCH) in a first slot, wherein the PDSCH on each candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions is scrambled by a first radio network temporary identifier (RNTI) specific to the UE and the PDSCH on each candidate PDSCH reception occasion of the second plurality of PDSCHs is scrambled by a second RNTI common to a group of UEs including the UE; and transmitting the PUCCH in the first slot.
  • Some embodiments of the present disclosure provide a method for wireless communication performed by a base station (BS) .
  • the method may include: indicating that hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for a physical downlink shared channel (PDSCH) on each candidate PDSCH reception occasion of a first plurality of candidate PDSCH reception occasions and HARQ-ACK feedback for a PDSCH on each candidate PDSCH reception occasion of a second plurality of candidate PDSCH reception occasions are to be multiplexed in a physical uplink control channel (PUCCH) in a first slot, wherein the PDSCH on each candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions is scrambled by a first radio network temporary identifier (RNTI) specific to a user equipment (UE) and the PDSCH on each candidate PDSCH reception occasion of the second plurality of PDSCHs is scrambled by a second RNTI common to a group of UEs including the UE; and receiving the PUCCH in the first slot
  • the apparatus may include: at least one non-transitory computer-readable medium having stored thereon computer-executable instructions; at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuitry and the at least one transmitting circuitry, wherein the at least one non-transitory computer-readable medium and the computer executable instructions may be configured to, with the at least one processor, cause the apparatus to perform a method according to some embodiments of the present disclosure.
  • the apparatus may include a processor and a transceiver coupled to the processor.
  • the processor and the transceiver may be configured to interact with each other to perform a method according to some embodiments of the present disclosure.
  • FIG. 1 illustrates a schematic diagram of a wireless communication system in accordance with some embodiments of the present disclosure
  • FIG. 2 illustrates a schematic diagram of a HARQ-ACK feedback transmission in accordance with some embodiments of the present disclosure
  • FIG. 3 illustrates an exemplary time domain resource allocation (TDRA) configuration in accordance with some embodiments of the present disclosure
  • FIG. 3A illustrates an exemplary TDRA configuration in accordance with some embodiments of the present disclosure
  • FIG. 3B illustrates an exemplary TDRA configuration in accordance with some embodiments of the present disclosure
  • FIG. 4 illustrates a flow chart of an exemplary procedure of wireless communications in accordance with some embodiments of the present disclosure
  • FIG. 5 illustrates a flow chart of an exemplary procedure of wireless communications in accordance with some embodiments of the present disclosure.
  • FIG. 6 illustrates a block diagram of an exemplary apparatus in accordance with some embodiments of the present disclosure.
  • FIG. 1 illustrates a schematic diagram of a wireless communication system 100 in accordance with some embodiments of the present disclosure.
  • a wireless communication system 100 may include some UEs 101 (e.g., UE 101a and UE 101b) and a base station (e.g., BS 102) . Although a specific number of UEs 101 and BS 102 are depicted in FIG. 1, it is contemplated that any number of UEs and BSs may be included in the wireless communication system 100.
  • the UE (s) 101 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., routers, switches, and modems) , or the like.
  • the UE (s) 101 may include a portable wireless communication device, a smart phone, a cellular telephone, a flip phone, a device having a subscriber identity module, a personal computer, a selective call receiver, or any other device that is capable of sending and receiving communication signals on a wireless network.
  • the UE (s) 101 includes wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like. Moreover, the UE (s) 101 may be referred to as a subscriber unit, a mobile, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or a device, or described using other terminology used in the art.
  • the UE (s) 101 may communicate with the BS 102 via uplink (UL) communication signals.
  • UL uplink
  • the BS 102 may be distributed over a geographic region.
  • the BS 102 may also be referred to as an access point, an access terminal, a base, a base unit, a macro cell, a Node-B, an evolved Node B (eNB) , a gNB, a Home Node-B, a relay node, or a device, or described using other terminology used in the art.
  • the BS 102 is generally a part of a radio access network that may include one or more controllers communicably coupled to one or more corresponding BSs 102.
  • the BS 102 may communicate with UE (s) 101 via downlink (DL) communication signals.
  • DL downlink
  • the wireless communication system 100 may be compatible with any type of network that is capable of sending and receiving wireless communication signals.
  • the wireless communication system 100 is compatible with a wireless communication network, a cellular telephone network, a time division multiple access (TDMA) -based network, a code division multiple access (CDMA) -based network, an orthogonal frequency division multiple access (OFDMA) -based network, an LTE network, a 3GPP-based network, a 3GPP 5G network, a satellite communications network, a high altitude platform network, and/or other communications networks.
  • TDMA time division multiple access
  • CDMA code division multiple access
  • OFDMA orthogonal frequency division multiple access
  • the wireless communication system 100 is compatible with 5G NR of the 3GPP protocol.
  • BS 102 may transmit data using an orthogonal frequency division multiple (OFDM) modulation scheme on the DL and the UE (s) 101 may transmit data on the UL using a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) or cyclic prefix-OFDM (CP-OFDM) scheme.
  • DFT-S-OFDM discrete Fourier transform-spread-orthogonal frequency division multiplexing
  • CP-OFDM cyclic prefix-OFDM
  • the wireless communication system 100 may implement some other open or proprietary communication protocols, for example, WiMAX, among other protocols.
  • the BS 102 and UE (s) 101 may communicate using other communication protocols, such as the IEEE 802.11 family of wireless communication protocols. Further, in some embodiments of the present disclosure, the BS 102 and UE (s) 101 may communicate over licensed spectrums, whereas in some other embodiments, the BS 102 and UE (s) 101 may communicate over unlicensed spectrums.
  • the present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol.
  • Two types of HARQ-ACK codebooks may be defined for HARQ-ACK multiplexing for multiple received PDSCHs.
  • One may be named a Type-1 HARQ-ACK codebook (also referred to as “semi-static HARQ-ACK codebook” )
  • another may be named a Type-2 HARQ-ACK codebook (also referred to as “dynamic HARQ-ACK codebook” )
  • the definitions of the Type-1 HARQ-ACK codebook and Type-2 HARQ-ACK codebook are specified in 3GPP specifications.
  • the size of a Type-1 HARQ-ACK codebook may be independent of the actual scheduling situation.
  • the number of HARQ-ACK information bits may be determined based on a list of parameters, including, for example, PDSCH-to-HARQ timing values (also referred to as “HARQ-ACK feedback timing set” or “K1 set” ) , the number of code block groups (CBGs) per component carrier (CC) , and/or other (s) .
  • the K1 set may be configured to a UE via an RRC signaling message or predefined in a standard (s) .
  • the K1 set may be configured by a higher layer parameter, e.g., dl-DataToUL-ACK in PUCCH-config information element (IE) .
  • IE PUCCH-config information element
  • both a Type-1 HARQ-ACK codebook and Type-2 HARQ-ACK codebook may be supported for UEs receiving multicast transmissions (e.g., PDSCHs scrambled by a group-common radio network temporary identifier (RNTI) ) .
  • UEs receiving multicast can be optionally configured with a separate PUCCH configuration for multicast.
  • a PUCCH configuration for unicast transmissions e.g., PDSCHs scrambled by a UE-specific RNTI
  • a UE may be configured with a PUCCH-config IE for multicast and another PUCCH-config IE for unicast.
  • a UE When separate PUCCH configurations are configured for unicast and multicast transmissions, a UE may be configured with separate K1 sets for unicast and multicast transmissions.
  • the K1 set would have a large impact on the Type-1 HARQ-ACK codebook determination according to, for example, the pseudo code in the 3GPP specification TS38.213.
  • an issue to be solved is how to construct the Type-1 HARQ-ACK codebook based on the separate K1 sets for unicast and multicast transmissions.
  • a solution to solve the above issue is to use the union of the K1 set for unicast and the K1 set for multicast.
  • a UE may determine a downlink association set for both unicast and multicast based on the union of the two K1 sets.
  • the UE may further determine a candidate PDSCH reception occasion (s) in each slot of the downlink association set, which corresponds to each value in the union of the two K1 sets.
  • FIG. 2 illustrates a schematic diagram of a HARQ-ACK feedback transmission in accordance with some embodiments of the present disclosure.
  • the K1 set for unicast is configured as ⁇ 1, 2, 3, 4 ⁇ and the K1 set for multicast is configured as ⁇ 2, 3 ⁇
  • the union of the K1 set for unicast and the K1 set for multicast is ⁇ 1, 2, 3, 4 ⁇ .
  • the Type-1 HARQ-ACK codebook is determined based on the union of the two K1 sets ⁇ 1, 2, 3, 4 ⁇ .
  • a UE may determine a downlink association set (slot set #1) for both unicast and multicast based on the union of the two K1 sets. Assuming a PUCCH transmission in slot n+4, slot set #1 may include the slots including candidate PDSCH reception occasions for unicast PDSCHs (if transmitted) and candidate PDSCH reception occasions for multicast PDSCHs (if transmitted) to be responded with HARQ-ACK feedback (e.g., ACK or NACK) in the same Type-1 HARQ-ACK codebook in slot n+4.
  • HARQ-ACK feedback e.g., ACK or NACK
  • the UE may determine that slot set #1 includes slot n (corresponding to K1 value “4” ) , slot n+1 (corresponding to K1 value “3” ) , slot n+2 (corresponding to K1 value “2” ) and slot n+3 (corresponding to K1 value “1” ) .
  • the candidate PDSCH reception occasion (s) in a scheduled slot may depend on a time domain resource allocation (TDRA) table, which may be configured to a UE via an RRC signaling message or predefined in a standard (s) .
  • TDRA table may be configured by a higher layer parameter, e.g., pdsch-TimeDomainAllocation.
  • each entry of the TDRA table may include a start and length indicator value (SLIV) indicating a starting symbol and length of a scheduled transmission (e.g., PDSCH) in a slot.
  • SLIV start and length indicator value
  • FIG. 3 illustrates an exemplary time domain resource allocation (TDRA) configuration 300 in accordance with some embodiments of the present disclosure.
  • TDRA time domain resource allocation
  • a UE may be configured with a TDRA table 320 for unicast transmissions, and a TDRA table 330 for multicast transmissions.
  • TDRA table 320 may include four SLIVs 321-327 and TDRA table 330 may include two SLIVs 331 and 333.
  • SLIVs 321-327 in the TDRA table 320 for unicast transmissions overlap with each other, which is referred to as one non-overlapped SLIV in the context of the disclosure. Accordingly, at most one PDSCH can be scheduled in a slot according to TDRA table 320. Therefore, the UE may determine that there is one candidate PDSCH reception occasion in a scheduled slot according to TDRA table 320. That is, the number of non-overlapped SLIVs in a TDRA table may denote the number of candidate PDSCH reception occasions per slot.
  • the number of candidate PDSCH reception occasions per slot may be dependent on UE capability. Assuming that a UE cannot receive more than one PDSCH per slot, the UE may determine that there is only one candidate PDSCH reception occasion in a scheduled slot according to the UE’s capability. For a UE not supporting receiving more than one PDSCH per slot, the UE may not be expected to be configured with more than one non-overlapped SLIV in the TDRA table.
  • the UE may determine that there is one candidate PDSCH reception occasion in a scheduled slot according to TDRA table 330.
  • construction of a Type-1 HARQ-ACK codebook may be based on the union of the TDRA table for unicast service and the TDRA table for multicast service (if they are separately configured) .
  • FIG. 3A illustrates a TDRA table union 340 of TDRA table 320 and TDRA table 330.
  • TDRA table union 340 includes SLIVs 321-327 from TDRA table 320 and SLIVs 331 and 333 from TDRA table 330, which overlap with each other. Accordingly, there is one non-overlapped SLIV in TDRA table union 340. Therefore, the UE may determine that there is one candidate PDSCH reception occasion in a scheduled slot (e.g., a slot in slot set #1 or slot set #2) according to TDRA table union 340.
  • a scheduled slot e.g., a slot in slot set #1 or slot set #2
  • FIG. 3B illustrates an exemplary TDRA configuration 300B in accordance with some embodiments of the present disclosure.
  • a UE may be configured with a TDRA table 350 for multicast or unicast transmissions, which may include four SLIVs 351-357.
  • SLIV 357 does not overlap SLIVs 351 and 353, which is referred to as two non-overlapped SLIVs in the context of the disclosure.
  • the number of candidate PDSCH reception occasions in a scheduled slot according to TDRA table 350 is two, which may respectively correspond to SLIV 351 and SLIV 357 or SLIV 353 and SLIV 357.
  • the number of candidate PDSCH reception occasions per slot may be dependent on UE capability. Assuming that a UE can receive two PDSCHs per slot, the UE may determine that there are two candidate PDSCH reception occasions in a scheduled slot according to the UE’s capability. For a UE supporting receiving more than one PDSCH per slot, the UE can be configured with more than one non-overlapped SLIV in the TDRA table.
  • an issue to be solved is how to determine the candidate PDSCH reception occasions in this slot. That is, how to determine the number of candidate PDSCH reception occasions in this slot.
  • each candidate PDSCH reception occasion may correspond to a specific number of HARQ-ACK information bits (e.g., one HARQ-ACK information bit in the case of a maximum single codeword per PDSCH and no CBG-based transmission, and more than one HARQ-ACK information bit in the case of multiple-input-multiple-output (MIMO) or CBG-based retransmission)
  • the determination of candidate PDSCH reception occasions would be relevant to the Type-1 HARQ-ACK codebook determination.
  • the number of PDSCHs which can be received in one slot may be relevant to a UE’s capability. Different UEs may have different capabilities, for example, some UEs can only receive one PDSCH per slot while some UEs can receive two PDSCHs per slot. Such UE capability should also be taken into account when generating a HARQ-ACK codebook.
  • Another issue to be solved is how to generate the Type-1 HARQ-ACK codebook. For example, how to arrange the HARQ-ACK feedback for unicast and HARQ-ACK feedback for multicast in the Type-1 HARQ-ACK codebook to be transmitted on the same PUCCH.
  • yet another issue to be solved is how to generate corresponding HARQ-ACK feedback when there is only one non-overlapped SLIV in the union of a unicast TDRA table and multicast TDRA table or when the UE cannot support receiving more than one PDSCH per slot. For example, when no PDSCH is received in the slot included in both the downlink association set for unicast transmissions and the downlink association set for multicast transmissions, should a NACK bit for this slot be counted as HARQ-ACK feedback for unicast or HARQ-ACK feedback for multicast? For example, assuming that a UE is configured with separate TDRA tables for unicast and multicast as shown in FIG.
  • Embodiments of the present disclosure provide solutions to solve the above issues. For example, solutions for determining the Type-1 HARQ-ACK codebook are proposed. More details on the embodiments of the present disclosure will be illustrated in the following text in combination with the appended drawings.
  • a UE may receive both unicast transmissions (e.g., PDSCHs are scrambled by a UE-specific RNTI, e.g., cell-RNTI (C-RNTI) , which is also referred to as “unicast PDSCHs” ) and multicast transmissions (e.g., PDSCHs are scrambled by a group-common RNTI, e.g., group-RNTI (G-RNTI) , which is also referred to as “multicast PDSCHs” ) .
  • a UE-specific RNTI e.g., cell-RNTI (C-RNTI)
  • multicast transmissions e.g., PDSCHs are scrambled by a group-common RNTI, e.g., group-RNTI (G-RNTI) , which is also referred to as “multicast PDSCHs”
  • G-RNTI group-RNTI
  • a UE may determine that HARQ-ACK feedback for a plurality of candidate PDSCH reception occasions are to be multiplexed in the same PUCCH in a slot (hereinafter, “slot #U1” ) .
  • the PUCCH may carry a HARQ-ACK codebook including HARQ-ACK information bits for the plurality of candidate PDSCH reception occasions.
  • the plurality of candidate PDSCH reception occasions may include a candidate PDSCH reception occasion (s) for a unicast transmission (s) (hereinafter, “candidate PDSCH reception occasions #A1” ) and a candidate PDSCH reception occasion (s) for a multicast transmission (s) (hereinafter, “candidate PDSCH reception occasions #B1” ) .
  • Candidate PDSCH reception occasions #A1 may be included in a downlink association set for unicast (hereinafter, “slot set #A1” ) .
  • candidate PDSCH reception occasions #B1 may be included in a downlink association set for multicast (hereinafter, “slot set #B1” ) .
  • slot set #A1 may be determined according to a HARQ-ACK feedback timing set (hereinafter, “K1 set #A1” ) configured for a unicast transmission (s) (or candidate PDSCH reception occasions #A1) .
  • Slot set #B1 may be determined according to a HARQ-ACK feedback timing set (hereinafter, “K1 set #B1” ) configured for a multicast transmission (s) (or candidate PDSCH reception occasions #B1) .
  • K1 set #A1, K1 set #B1, or both may be predefined in a standard (s) .
  • the candidate PDSCH reception occasion (s) in slot #M1 may be determined according to the union of the TDRA table (hereinafter, “TDRA table #A1” ) configured for a unicast transmission (s) (or candidate PDSCH reception occasions #A1) and the TDRA table (hereinafter, “TDRA table #B1” ) configured for a multicast transmission (s) (or candidate PDSCH reception occasions #B1) .
  • the candidate PDSCH reception occasion (s) in this slot (e.g., candidate PDSCH reception occasion (s) in candidate PDSCH reception occasions #A1) may be determined according to TDRA table #A1.
  • the candidate PDSCH reception occasion (s) in this slot (e.g., candidate PDSCH reception occasion (s) in candidate PDSCH reception occasions #B1) may be determined according to TDRA table #B1.
  • the PUCCH may carry two HARQ-ACK codebooks, for example, one (hereinafter, “HARQ-ACK codebook #A1” ) for candidate PDSCH reception occasions #A1 and another (hereinafter, “HARQ-ACK codebook #B1” ) for candidate PDSCH reception occasions #B1.
  • HARQ-ACK codebook #A1 one for candidate PDSCH reception occasions #A1
  • HARQ-ACK codebook #B1 HARQ-ACK codebook #B1
  • the method for generating the two HARQ-ACK codebooks is further described in detail below.
  • slot set #A1 may be determined according to K1 set #A1
  • slot set #B1 may be determined according to K1 set #B1.
  • candidate PDSCH reception occasions may be determined from the first slot to the last slot within the union of slot set #A1 and slot set #B1.
  • a candidate PDSCH reception occasion (s) in this slot is determined according to TDRA table #A1.
  • the candidate PDSCH reception occasion (s) belongs to candidate PDSCH reception occasions #A1.
  • the number of candidate PDSCH reception occasions in this slot may equal the number of the non-overlapped SLIVs in TDRA table #A1.
  • a candidate PDSCH reception occasion (s) in this slot is determined according to TDRA table #B1.
  • the candidate PDSCH reception occasion (s) belongs to candidate PDSCH reception occasions #B1.
  • a candidate PDSCH reception occasion (s) in slot #M1 is determined according to the union of TDRA table #A1 and TDRA table #B1. For example, in the case that the number of non-overlapped SLIVs in the union of TDRA table #A1 and TDRA table #B1 is 1 (e.g., referring to FIG. 3A) , two candidate PDSCH reception occasions may be determined in slot #M1. In other words, although a maximum of one PDSCH can be transmitted in slot #M1 in practice, two candidate PDSCH reception occasions are assumed in slot #M1.
  • candidate PDSCH reception occasion #1 One (hereinafter, “candidate PDSCH reception occasion #1” ) of the two candidate PDSCH reception occasions belongs to candidate PDSCH reception occasions #A1, and the other (hereinafter, “candidate PDSCH reception occasion #2” ) of the two candidate PDSCH reception occasions belongs to candidate PDSCH reception occasions #B1.
  • the UE capability should be considered when determining the number of candidate PDSCH reception occasion (s) in a scheduled slot. For example, when a UE does not support receiving more than one PDSCH per slot, the UE may determine one candidate PDSCH reception occasion in a slot included only in slot set #A1 or slot set #B1 and two candidate PDSCH reception occasions in slot #M1. In some cases, the UE may be configured with a TDRA table according to its capability. For example, the configured TDRA table may include one non-overlapped SLIV when more than one PDSCH per slot is not supported.
  • HARQ-ACK codebook #A1 may be generated for a PDSCH on each candidate PDSCH reception occasion of candidate PDSCH reception occasions #A1.
  • HARQ-ACK codebook #B1 may be generated for a PDSCH on each candidate PDSCH reception occasion of candidate PDSCH reception occasions #B1.
  • the UE may generate a HARQ-ACK information bit (s) for the corresponding candidate PDSCH reception occasion in this slot according to the decoding result of the PDSCH and multiplex the HARQ-ACK information bit (s) in the corresponding HARQ-ACK codebook (e.g., HARQ-ACK codebook #A1 or HARQ-ACK codebook #B1) .
  • the UE may generate a NACK bit (s) for the corresponding candidate PDSCH reception occasion in this slot.
  • the number of HARQ-ACK information bits for a single PDSCH or candidate PDSCH reception occasion may vary, for example, one in the case of a maximum single codeword per PDSCH and no CBG-based transmission, and more than one in the case of MIMO or CBG-based retransmission.
  • this unicast PDSCH may be assumed on candidate PDSCH reception occasion #1 and a discontinuous transmission (DTX) may be assumed on candidate PDSCH reception occasion #2.
  • the UE may generate a HARQ-ACK information bit (s) for the unicast PDSCH on candidate PDSCH reception occasion #1 according to the decoding result of the unicast PDSCH and multiplex the HARQ-ACK information bit (s) in HARQ-ACK codebook #A1.
  • the UE may generate a NACK bit (s) for candidate PDSCH reception occasion #2 for padding and multiplex the NACK bit (s) in HARQ-ACK codebook #B1.
  • this multicast PDSCH may be assumed on candidate PDSCH reception occasion #2, and a DTX may be assumed on candidate PDSCH reception occasion #1.
  • the UE may generate a NACK bit (s) for candidate PDSCH reception occasion #1 for padding and multiplex the NACK bit (s) in HARQ-ACK codebook #A1.
  • the UE may generate a HARQ-ACK information bit (s) for the multicast PDSCH on candidate PDSCH reception occasion #2 according to the decoding result of the multicast PDSCH and multiplex the HARQ-ACK information bit (s) in HARQ-ACK codebook #B1.
  • a DTX may be assumed on both candidate PDSCH reception occasions #1 and #2.
  • the UE may generate a NACK bit (s) for candidate PDSCH reception occasion #1 for padding and multiplex the NACK bit (s) in HARQ-ACK codebook #A1.
  • the UE may generate a NACK bit (s) for candidate PDSCH reception occasion #2 for padding and multiplex the NACK bit (s) in HARQ-ACK codebook #B1.
  • the UE may multiplex the HARQ-ACK information bit (s) for candidate PDSCH reception occasions #A1 in HARQ-ACK codebook #A1 and multiplex the HARQ-ACK information bit (s) for candidate PDSCH reception occasions #B1 in HARQ-ACK codebook #B1 according to various manners.
  • the multiplexing may be based on the order of the candidate PDSCH reception occasions in the time domain, e.g., an order of slot indexes of the candidate PDSCH reception occasions.
  • HARQ-ACK codebook #A1 and HARQ-ACK codebook #B1 may then be arranged into one HARQ-ACK codebook carried by the PUCCH to be transmitted in slot #U1.
  • HARQ-ACK codebook #A1 may be arranged in front of HARQ-ACK codebook #B1.
  • HARQ-ACK codebook #B1 may be arranged in front of HARQ-ACK codebook #B1.
  • a UE may determine that slot set #A1 for a PUCCH in slot n+4 includes slot n, slot n+1, slot n+2, and slot n+3. Based on the configured K1 set ⁇ 2, 3 ⁇ for multicast, the UE may determine that slot set #B1 for the PUCCH in slot n+4 includes slot n+1 and slot n+2.
  • the union of slot set #A1 and slot set #B1 thus includes slot n, slot n+1, slot n+2, and slot n+3, wherein slot n+1 and slot n+2 are included in both slot set #A1 and slot set #B1.
  • the candidate PDSCH reception occasions in slot n and slot n+3 are determined according to TDRA table #A1 (e.g., TDRA table 320 in FIG. 3)
  • the candidate PDSCH reception occasions in slot n+1 and slot n+2 are determined according to the union (e.g., TDRA table union 340 in FIG. 3A) of TDRA table #A1 and TDRA table #B1 (e.g., TDRA table 330 in FIG. 3) .
  • a single candidate PDSCH reception occasion may be determined for each of slot n and slot n+3 in slot set #A1. Since one non-overlapped SLIV is included in TDRA table union 340, two candidate PDSCH reception occasions may be determined for each of slot n+1 and slot n+2. One of the two candidate PDSCH reception occasions for slot n+1 (or slot n+2) belongs to slot set #A1 and the other of the two candidate PDSCH reception occasions for slot n+1 (or slot n+2) belongs to slot set #B1.
  • HARQ-ACK codebook #A1 may be generated as ⁇ a0, a1, a2, a3 ⁇ , where “a0” , “a1” , “a2” and “a3” are ACK or NACK bits corresponding to slot n, slot n+1, slot n+2, and slot n+3, respectively.
  • HARQ-ACK codebook #B1 may be generated as ⁇ b0, b1 ⁇ , where “b0” and “b1” are ACK or NACK bits corresponding to slot n+1 and slot n+2, respectively.
  • the two codebooks are then concatenated, for example, HARQ-ACK codebook #A1 is placed firstly then followed by HARQ-ACK codebook #B1, or vice versa.
  • the two HARQ-ACK codebooks may be concatenated as ⁇ a0, a1, a2, a3, b0, b1 ⁇ , which is transmitted in the PUCCH in slot n+4.
  • the above solution would not introduce unnecessary signaling overhead and would reduce the size of the Type-1 HARQ-ACK codebook.
  • HARQ-ACK feedback for unicast and multicast transmissions may be arranged in a single HARQ-ACK codebook.
  • the HARQ-ACK information bit (s) for each candidate PDSCH reception occasion may be generated and then concatenated according to the order (e.g., ascending order or descending order) of the candidate PDSCH reception occasions in the time domain.
  • the HARQ-ACK information bits for the candidate PDSCH reception occasions may be arranged according to the order (e.g., ascending order or descending order) of slot indexes of the candidate PDSCH reception occasions.
  • the HARQ-ACK information bits for the candidate PDSCH reception occasions in slots n to n+3 may be arranged according to the ascending order of slot indexes n to n+3.
  • the HARQ-ACK information bits for the candidate PDSCH reception occasions per slot may be arranged according to the predefined rules. For example, the HARQ-ACK information bits for candidate unicast PDSCH reception occasions may be arranged firstly then followed by the HARQ-ACK information bits for candidate multicast PDSCH reception occasions; or vice versa.
  • the HARQ-ACK information bit (s) for the candidate unicast PDSCH reception occasion may be placed firstly and then followed by the HARQ-ACK information bit (s) for the candidate multicast PDSCH reception occasion, or vice versa.
  • slot set #A1 may be determined according to K1 set #A1
  • slot set #B1 may be determined according to K1 set #B1.
  • candidate PDSCH reception occasions may be determined from the first slot to the last slot within the union of slot set #A1 and slot set #B1.
  • a candidate PDSCH reception occasion (s) in this slot is determined according to TDRA table #A1.
  • the candidate PDSCH reception occasion (s) belongs to candidate PDSCH reception occasions #A1.
  • the number of candidate PDSCH reception occasions in this slot may equal the number of the non-overlapped SLIVs in TDRA table #A1.
  • a candidate PDSCH reception occasion (s) in this slot is determined according to TDRA table #B1.
  • the candidate PDSCH reception occasion (s) belongs to candidate PDSCH reception occasions #B1.
  • the UE capability should be considered when determining the number of candidate PDSCH reception occasion (s) in a scheduled slot. For example, when a UE does not support receiving more than one PDSCH per slot, the UE may determine one candidate PDSCH reception occasion in a slot included only in slot set #A1 or slot set #B1, regardless of the number of the non-overlapped SLIVs in the corresponding TDRA table. In some cases, the UE may be configured with a TDRA table according to its capability. For example, the configured TDRA table may include one non-overlapped SLIV when more than one PDSCH per slot is not supported.
  • a candidate PDSCH reception occasion (s) in slot #M1 may be determined according to the union of TDRA table #A1 and TDRA table #B1.
  • Various methods may be employed to determine the candidate PDSCH reception occasion (s) in slot #M1, and will be described in detail in the following text.
  • HARQ-ACK information bit (s) for each of the candidate PDSCH reception occasions within each slot of slot set #A1 and slot set #B1 may be generated.
  • HARQ-ACK information bit (s) for each of candidate PDSCH reception occasions #A1 and #B1 may be generated.
  • the UE may generate a HARQ-ACK information bit (s) for the corresponding candidate PDSCH reception occasion in this slot according to the decoding result of the PDSCH and multiplex the HARQ-ACK information bit (s) in the HARQ-ACK codebook according to the time order. Otherwise, if no PDSCH is received in the slot only included in slot set #A1 or slot set #B1, the UE may generate a NACK bit (s) for the corresponding candidate PDSCH reception occasion in this slot.
  • the HARQ-ACK information bits for candidate PDSCH reception occasions #A1 and #B1 may be arranged according to a time order (e.g., ascending order or descending order) of candidate PDSCH reception occasions #A1 and #B1.
  • two candidate PDSCH reception occasions may be determined in slot #M1.
  • two candidate PDSCH reception occasions are assumed in slot #M1.
  • One (e.g., candidate PDSCH reception occasion #1) of the two candidate PDSCH reception occasions belongs to candidate PDSCH reception occasions #A1, and the other (e.g., candidate PDSCH reception occasion #2) of the two candidate PDSCH reception occasions belongs to candidate PDSCH reception occasions #B1.
  • the UE capability should be considered when determining the number of candidate PDSCH reception occasion (s) in a scheduled slot. For example, when a UE does not support receiving more than one PDSCH per slot, the UE may determine two candidate PDSCH reception occasion in slot #M1. In some cases, the UE may be configured with a TDRA table according to its capability.
  • this unicast PDSCH may be assumed on candidate PDSCH reception occasion #1 and a discontinuous transmission (DTX) may be assumed on candidate PDSCH reception occasion #2.
  • the UE may generate a HARQ-ACK information bit (s) for the unicast PDSCH on candidate PDSCH reception occasion #1 according to the decoding result of the unicast PDSCH.
  • the UE may generate a NACK bit (s) for candidate PDSCH reception occasion #2 for padding.
  • this multicast PDSCH may be assumed on candidate PDSCH reception occasion #2, and a DTX may be assumed on candidate PDSCH reception occasion #1.
  • the UE may generate a NACK bit (s) for candidate PDSCH reception occasion #1 for padding.
  • the UE may generate a HARQ-ACK information bit (s) for the multicast PDSCH on candidate PDSCH reception occasion #2 according to the decoding result of the multicast PDSCH.
  • a DTX may be assumed on both candidate PDSCH reception occasions #1 and #2.
  • the UE may generate a NACK bit (s) for candidate PDSCH reception occasion #1 for padding and a NACK bit (s) for candidate PDSCH reception occasion #2 for padding.
  • the HARQ-ACK information bits for all the candidate PDSCH reception occasions may be arranged according to an order of the candidate PDSCH reception occasions in the time domain. Since slot #M1 includes two candidate PDSCH reception occasions, that is, candidate PDSCH reception occasions #1 and #2 have the same order in the time domain, in some examples, HARQ-ACK information bit (s) for candidate PDSCH reception occasion #1 may be placed firstly and then followed by the HARQ-ACK information bit (s) for candidate PDSCH reception occasion #2. In some other examples, HARQ-ACK information bit (s) for candidate PDSCH reception occasion #2 may be placed firstly and then followed by the HARQ-ACK information bit (s) for candidate PDSCH reception occasion #1.
  • the HARQ-ACK information bits for the candidate PDSCH reception occasions per slot may be arranged according to the predefined rules.
  • a UE may determine that slot set #A1 for a PUCCH in slot n+4 includes slot n, slot n+1, slot n+2, and slot n+3. Based on the configured K1 set ⁇ 2, 3 ⁇ for multicast, the UE may determine that slot set #B1 for the PUCCH in slot n+4 includes slot n+1 and slot n+2.
  • the union of slot set #A1 and slot set #B1 thus includes slot n, slot n+1, slot n+2, and slot n+3, wherein slot n+1 and slot n+2 are included in both slot set #A1 and slot set #B1.
  • the candidate PDSCH reception occasions in slot n and slot n+3 are determined according to TDRA table #A1 (e.g., TDRA table 320 in FIG. 3)
  • the candidate PDSCH reception occasions in slot n+1 and slot n+2 are determined according to the union (e.g., TDRA table union 340 in FIG. 3A) of TDRA table #A1 and TDRA table #B1 (e.g., TDRA table 330 in FIG. 3) .
  • a single candidate PDSCH reception occasion may be determined for each of slot n and slot n+3 in slot set #A1. Since one non-overlapped SLIV is included in TDRA table union 340, two candidate PDSCH reception occasions may be determined for each of slot n+1 and slot n+2. One of the two candidate PDSCH reception occasions for slot n+1 (or slot n+2) belongs to slot set #A1 and the other of the two candidate PDSCH reception occasions for slot n+1 (or slot n+2) belongs to slot set #B1.
  • a single HARQ-ACK codebook for both unicast and multicast PDSCHs may be generated as ⁇ a0, a1/NACK, b0/NACK, a2/NACK, b1/NACK, a3 ⁇ .
  • “a0” and “a3” are ACK or NACK bits corresponding to unicast PDSCHs in slot n, and slot n+3, respectively.
  • “a1” in “a1/NACK” denotes an ACK or NACK bit (s) corresponding to a unicast PDSCH in slot n+1 when the unicast PDSCH is received and “NACK” in “a1/NACK” denotes a NACK bit (s) for padding when the unicast PDSCH is not received in slot n+1.
  • “b0” in “b0/NACK” denotes an ACK or NACK bit (s) corresponding to a multicast PDSCH in slot n+1 when the multicast PDSCH is received and “NACK” in “b0/NACK” denotes a NACK bit (s) for padding when the multicast PDSCH is not received in slot n+1.
  • “a2” in “a2/NACK” denotes an ACK or NACK bit (s) corresponding to a unicast PDSCH in slot n+2 when the unicast PDSCH is received and “NACK” in “a2/NACK” denotes a NACK bit (s) for padding when the unicast PDSCH is not received in slot n+2.
  • b1 in “b1/NACK” denotes an ACK or NACK bit (s) corresponding to a multicast PDSCH in slot n+2 when the multicast PDSCH is received and “NACK” in “b1/NACK” denotes a NACK bit (s) for padding when the multicast PDSCH is not received in slot n+2.
  • the single HARQ-ACK codebook for both unicast and multicast PDSCHs may be generated as ⁇ a0, a1/NACK, a2/NACK, a3, b0/NACK, b1/NACK ⁇ .
  • the above solution would not introduce unnecessary signaling overhead and would reduce the size of the Type-1 HARQ-ACK codebook.
  • a single candidate PDSCH reception occasion may be determined in slot #M1.
  • the UE capability should be considered when determining the number of candidate PDSCH reception occasion (s) in a scheduled slot. For example, when a UE does not support receiving more than one PDSCH per slot, the UE may determine a single candidate PDSCH reception occasion in slot #M1. In some cases, the UE may be configured with a TDRA table according to its capability.
  • This single candidate PDSCH reception occasion may be assumed for either unicast or multicast. That is, it may be included in either candidate PDSCH reception occasions #A1 or candidate PDSCH reception occasions #B1.
  • this unicast PDSCH may be assumed on the single candidate PDSCH reception occasion.
  • the UE may generate a HARQ-ACK information bit (s) for the unicast PDSCH on the single candidate PDSCH reception occasion according to the decoding result of the unicast PDSCH.
  • this multicast PDSCH may be assumed on the single candidate PDSCH reception occasion.
  • the UE may generate a HARQ-ACK information bit (s) for the multicast PDSCH on the single candidate PDSCH reception occasion according to the decoding result of the multicast PDSCH.
  • the UE may generate a NACK bit (s) for the single candidate PDSCH reception occasion for padding.
  • the HARQ-ACK information bits for all the candidate PDSCH reception occasions may be arranged according to an order of the candidate PDSCH reception occasions in the time domain.
  • the codebook size of the HARQ-ACK codebook for both unicast and multicast transmissions is not changed, which would avoid any misunderstanding between the UE and the BS on the HARQ-ACK codebook.
  • a UE may determine that slot set #A1 for a PUCCH in slot n+4 includes slot n, slot n+1, slot n+2, and slot n+3. Based on the configured K1 set ⁇ 2, 3 ⁇ for multicast, the UE may determine that slot set #B1 for the PUCCH in slot n+4 includes slot n+1 and slot n+2.
  • the union of slot set #A1 and slot set #B1 thus includes slot n, slot n+1, slot n+2, and slot n+3, wherein slot n+1 and slot n+2 are included in both slot set #A1 and slot set #B1.
  • the candidate PDSCH reception occasions in slot n and slot n+3 are determined according to TDRA table #A1 (e.g., TDRA table 320 in FIG. 3)
  • the candidate PDSCH reception occasions in slot n+1 and slot n+2 are determined according to the union (e.g., TDRA table union 340 in FIG. 3A) of TDRA table #A1 and TDRA table #B1 (e.g., TDRA table 330 in FIG. 3) .
  • a single candidate PDSCH reception occasion may be determined for each of slot n and slot n+3 in slot set #A1. Since one non-overlapped SLIV is included in TDRA table union 340, a single candidate PDSCH reception occasion may be determined for each of slot n+1 and slot n+2.
  • a single HARQ-ACK codebook for both unicast and multicast PDSCHs may be generated as ⁇ a0, a1/b0/NACK, a2/b1/NACK, a3 ⁇ .
  • “a0” and “a3” are ACK or NACK bits corresponding to unicast PDSCHs in slot n, and slot n+3, respectively.
  • “a1” in “a1/b0/NACK” denotes an ACK or NACK bit (s) corresponding to a unicast PDSCH in slot n+1 when the unicast PDSCH is received
  • “b0” in “a1/b0/NACK” denotes an ACK or NACK bit (s) corresponding to a multicast PDSCH in slot n+1 when the multicast PDSCH is received
  • “NACK” in “a1/b0/NACK” denotes a NACK bit (s) for padding when neither the unicast PDSCH nor multicast PDSCH is received in slot n+1.
  • a2 in “a2/b1/NACK” denotes an ACK or NACK bit (s) corresponding to a unicast PDSCH in slot n+2 when the unicast PDSCH is received
  • b1 in “a2/b1/NACK” denotes an ACK or NACK bit (s) corresponding to a multicast PDSCH in slot n+2 when the multicast PDSCH is received
  • NACK in “a2/b1/NACK” denotes a NACK bit (s) for padding when neither the unicast PDSCH nor multicast PDSCH is received in slot n+2.
  • the above solution would not introduce unnecessary signaling overhead and would reduce the size of the Type-1 HARQ-ACK codebook.
  • the union of K1 set for a unicast transmission (s) and K1 set for a multicast transmission (s) and the union of the TDRA table for a unicast transmission (s) and the TDRA table for a multicast transmission (s) may not be employed.
  • the plurality of candidate PDSCH reception occasions with HARQ-ACK feedback to be multiplexed in the same PUCCH in a slot may include a candidate PDSCH reception occasion (s) for a unicast transmission (s) (hereinafter, “candidate PDSCH reception occasions #A2” ) and a candidate PDSCH reception occasion (s) for a multicast transmission (s) (hereinafter, “candidate PDSCH reception occasions #B2” ) .
  • Candidate PDSCH reception occasions #A2 may be included in a downlink association set for unicast (hereinafter, “slot set #A2” ) .
  • candidate PDSCH reception occasions #B2 may be included in a downlink association set for multicast (hereinafter, “slot set #B2” ) .
  • slot set #A2 may be determined according to a HARQ-ACK feedback timing set (hereinafter, “K1 set #A2” ) for a unicast transmission (s) (or candidate PDSCH reception occasions #A2) .
  • Slot set #B2 may be determined according to a HARQ-ACK feedback timing set (hereinafter, “K1 set #B2” ) configured for a multicast transmission (s) (or candidate PDSCH reception occasions #B2) .
  • the candidate PDSCH reception occasion (s) is determined according to the TDRA table (hereinafter, “TDRA table #A2” ) for a unicast transmission (s) (or candidate PDSCH reception occasions #A2) .
  • the candidate PDSCH reception occasion (s) is determined according to the TDRA table (hereinafter, “TDRA table #B2” ) for a multicast transmission (s) (or candidate PDSCH reception occasions #B2) .
  • the UE capability should be considered when determining the number of candidate PDSCH reception occasion (s) in a scheduled slot. For example, when a UE does not support receiving more than one PDSCH per slot, the UE may determine one candidate PDSCH reception occasion in a scheduled slot. In some cases, the UE may be configured with a TDRA table according to its capability.
  • a HARQ-ACK codebook for unicast (hereinafter, “HARQ-ACK codebook #A2” ) may be generated according to K1 set #A2 and TDRA table #A2.
  • a HARQ-ACK codebook for multicast (hereinafter, “HARQ-ACK codebook #B2” ) may be generated according to K1 set #B2 and TDRA table #B2.
  • HARQ-ACK codebook #A2 and HARQ-ACK codebook #B2 may then be arranged into one HARQ-ACK codebook carried by the PUCCH to be transmitted in slot #U1.
  • HARQ-ACK codebook #A2 may be arranged in front of HARQ-ACK codebook #B2.
  • HARQ-ACK codebook #B2 may be arranged in front of HARQ-ACK codebook #B2.
  • slot set #A2 may be determined according to K1 set #A2.
  • Candidate PDSCH reception occasions #A2 in slot set #A2 may be determined according to TDRA table #A2.
  • HARQ-ACK codebook #A2 may be generated for each of candidate PDSCH reception occasions #A2.
  • slot set #B2 may be determined according to K1 set #B2.
  • candidate PDSCH reception occasions #B2 in slot set #B2 may be determined according to TDRA table #B2.
  • HARQ-ACK codebook #B2 may be generated for each of candidate PDSCH reception occasions #B2.
  • HARQ-ACK codebook #A2 and HARQ-ACK codebook #B2 may be concatenated, for example, HARQ-ACK codebook #A2 is placed firstly then followed by HARQ-ACK codebook #B2, or vice versa, to be transmitted on the PUCCH in slot #U1.
  • a UE may determine that slot set #A2 for a PUCCH in slot n+4 includes slot n, slot n+1, slot n+2, and slot n+3. Based on the configured K1 set ⁇ 2, 3 ⁇ for multicast, the UE may determine that slot set #B2 for the PUCCH in slot n+4 includes slot n+1 and slot n+2.
  • the candidate PDSCH reception occasion (s) for each slot in slot set #A2 may be determined according to TDRA table #A2 (e.g., TDRA table 320 in FIG. 3) .
  • the candidate PDSCH reception occasion (s) for each slot in slot set #B2 may be determined according to TDRA table #B2 (e.g., TDRA table 330 in FIG. 3) .
  • a single candidate PDSCH reception occasion may be determined for each of slot n, slot n+1, slot n+2, and slot n+3 in slot set #A2. Since one non-overlapped SLIV is included in TDRA table 330, a single candidate PDSCH reception occasion may be determined for each of slot n+1 and slot n+2 in slot set #B2.
  • HARQ-ACK codebook #A2 may be generated as ⁇ a0, a1, a2, a3 ⁇ , where “a0” , “a1” , “a2” and “a3” are ACK or NACK bits corresponding to slot n, slot n+1, slot n+2, and slot n+3, respectively.
  • HARQ-ACK codebook #B2 may be generated as ⁇ b0, b1 ⁇ , where “b0” and “b1” are ACK or NACK bits corresponding to slot n+1 and slot n+2, respectively.
  • the two codebooks are then concatenated, for example, HARQ-ACK codebook #A2 is placed firstly then followed by HARQ-ACK codebook #B2, or vice versa.
  • the two HARQ-ACK codebooks may be concatenated as ⁇ a0, a1, a2, a3, b0, b1 ⁇ , which is transmitted in the PUCCH in slot n+4.
  • the above solution would not introduce unnecessary signaling overhead and would reduce the size of the Type-1 HARQ-ACK codebook.
  • FIG. 4 illustrates a flow chart of an exemplary procedure 400 for wireless communications in accordance with some embodiments of the present disclosure. Details described in all of the foregoing embodiments of the present disclosure are applicable for the embodiments shown in FIG. 4.
  • the procedure may be performed by a UE, for example, UE 101 in FIG. 1.
  • a UE may determine that HARQ-ACK feedback for a PDSCH on each candidate PDSCH reception occasion of a first plurality of candidate PDSCH reception occasions (e.g., candidate PDSCH reception occasions #A1 or candidate PDSCH reception occasions #A2) and HARQ-ACK feedback for a PDSCH on each candidate PDSCH reception occasion of a second plurality of candidate PDSCH reception occasions (e.g., candidate PDSCH reception occasions #B1 or candidate PDSCH reception occasions #B2) are to be multiplexed in a PUCCH in a first slot (e.g., slot #U1 or slot n+4 in FIG. 2) .
  • a first plurality of candidate PDSCH reception occasions e.g., candidate PDSCH reception occasions #A1 or candidate PDSCH reception occasions #A2
  • HARQ-ACK feedback for a PDSCH on each candidate PDSCH reception occasion of a second plurality of candidate PDSCH reception occasions e.g., candidate PDSCH reception occasions #B1 or
  • the PDSCH on each candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions may be scrambled by a first RNTI specific to the UE (e.g., C-RNTI) and the PDSCH on each candidate PDSCH reception occasion of the second plurality of PDSCHs may be scrambled by a second RNTI common to a group of UEs including the UE (e.g., G-RNTI for multicast) .
  • the UE may transmit the PUCCH in the first slot.
  • the first plurality of candidate PDSCH reception occasions may be included in a first set of slots (e.g., slot set #A1 or slot set #A2) and the second plurality of candidate PDSCH reception occasions are included in a second set of slots (e.g., slot set #B1 or slot set #B2) .
  • the first set of slots may be determined based on a first HARQ-ACK feedback timing set (e.g., K1 set #A1 or K1 set #A2) configured for the first plurality of candidate PDSCH reception occasions and the second set of slots is determined based on a second HARQ-ACK feedback timing set (e.g., K1 set #B1 or K1 set #B2) configured for the second plurality of candidate PDSCH reception occasions.
  • a first HARQ-ACK feedback timing set e.g., K1 set #A1 or K1 set #A2
  • K1 set #B1 or K1 set #B2 e.g., K1 set #B1 or K1 set #B2
  • the UE may determine a candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions in the slot according to a first TDRA table (e.g., TDRA table #A1 or TDRA table #A2) configured for the first plurality of candidate PDSCH reception occasions.
  • a first TDRA table e.g., TDRA table #A1 or TDRA table #A2
  • the UE may determine a candidate PDSCH reception occasion of the second plurality of candidate PDSCH reception occasions in the slot according to a second TDRA table (e.g., TDRA table #B1 or TDRA table #B2) configured for the second plurality of candidate PDSCH reception occasions.
  • TDRA table 320 or TDRA table 330 one candidate PDSCH reception occasion may be determined for the slot.
  • two candidate PDSCH reception occasions may be determined for the slot.
  • the UE may determine a candidate PDSCH reception occasion in the slot according to a union of the first and second TDRA tables (e.g., TDRA table union 340 in FIG. 3A) .
  • the UE may determine a candidate PDSCH reception occasion according to a union of the first and second TDRA tables by: in response to a number of non-overlapped SLIVs in the union of the first and second TDRA tables being equal to 1 or the UE supporting receiving a maximum of one PDSCH per slot, determining two candidate PDSCH reception occasions in the slot (e.g., slot #M1) included in both the first and second sets of slots. For example, referring back to FIG. 3A, according to TDRA table union 340, two candidate PDSCH reception occasion may be determined for the slot.
  • One (e.g., candidate PDSCH reception occasion #1) of the two candidate PDSCH reception occasions may be included in the first plurality of candidate PDSCH reception occasions and the other (e.g., candidate PDSCH reception occasion #2) of two candidate PDSCH reception occasions may be included in the second plurality of candidate PDSCH reception occasions.
  • the UE may determine a candidate PDSCH reception occasion according to a union of the first and second TDRA tables by: in response to a number of non-overlapped SLIVs in the union of the first and second TDRA tables being equal to 1 or the UE supporting receiving a maximum of one PDSCH per slot, determining a single candidate PDSCH reception occasion in the slot (e.g., slot #M1) included in both the first and second sets of slots.
  • a single candidate PDSCH reception occasion may be determined for the slot.
  • the single candidate PDSCH reception occasion may be included in either the first plurality of candidate PDSCH reception occasions or the second plurality of candidate PDSCH reception occasions.
  • the UE may generate a HARQ-ACK information bit (s) for the single candidate PDSCH reception occasion in response to receiving a single PDSCH scrambled by the first RNTI in the slot included in both the first and second sets of slots.
  • the UE may generate a HARQ-ACK information bit (s) for the single candidate PDSCH reception occasion in response to receiving a single PDSCH scrambled by the second RNTI in the slot included in both the first and second sets of slots.
  • the UE may generate a NACK) bit (s) for the single candidate PDSCH reception occasion in response to not receiving a PDSCH in the slot included in both the first and second sets of slots.
  • the PUCCH may carry a first HARQ-ACK codebook (e.g., HARQ-ACK codebook #A1 or HARQ-ACK codebook #A2) for the first plurality of candidate PDSCH reception occasions and a second HARQ-ACK codebook (e.g., HARQ-ACK codebook #B1 or HARQ-ACK codebook #B2) for the second plurality of candidate PDSCH reception occasions.
  • the first HARQ-ACK codebook may be arranged in front of the second HARQ-ACK codebook in the PUCCH.
  • the second HARQ-ACK codebook may be arranged in front of the first HARQ-ACK codebook in the PUCCH.
  • the UE may generate a HARQ-ACK information bit (s) for each candidate PDSCH reception occasion in either the first plurality of candidate PDSCH reception occasions or the second plurality of candidate PDSCH reception occasions.
  • the UE may further arrange HARQ-ACK information bits for the candidate PDSCH reception occasions among the first set of slots and the second set of slots in a HARQ-ACK codebook according to an order (e.g., an ascending or descending order) of the candidate PDSCH reception occasions in the time domain or a predefined rule.
  • the HARQ-ACK codebook may be carried in the PUCCH.
  • the UE may arrange the HARQ-ACK information bits for the candidate PDSCH reception occasions according to the order of the candidate PDSCH reception occasions in the time domain by: arranging the HARQ-ACK information bits for the candidate PDSCH reception occasions according to an order of slot indexes of the candidate PDSCH reception occasions.
  • the HARQ-ACK information bit (s) for the first candidate PDSCH reception occasion may be arranged in front of the HARQ-ACK information bit (s) for the second candidate PDSCH reception occasion in the HARQ-ACK codebook.
  • the HARQ-ACK information bit (s) for the second candidate PDSCH reception occasion may be arranged in front of the HARQ-ACK information bit (s) for the first candidate PDSCH reception occasion in the HARQ-ACK codebook.
  • the UE may determine a candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions (e.g., candidate PDSCH reception occasions #A2) in each of the first set of slots (e.g., slot set #A2) according to non-overlapped SLIVs in a first TDRA table (e.g., TDRA table #A2) configured for the first plurality of candidate PDSCH reception occasions.
  • a candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions e.g., candidate PDSCH reception occasions #A2
  • the first set of slots e.g., slot set #A2
  • TDRA table #A2 e.g., TDRA table #A2
  • the UE may further determine a candidate PDSCH reception occasion of the second plurality of candidate PDSCH reception occasions (e.g., candidate PDSCH reception occasions #B2) in each of the second set of slots (e.g., slot set #B2) according to non-overlapped SLIVs in a second TDRA table (e.g., TDRA table #B2) configured for the second plurality of candidate PDSCH reception occasions.
  • a candidate PDSCH reception occasion of the second plurality of candidate PDSCH reception occasions e.g., candidate PDSCH reception occasions #B2
  • a second TDRA table e.g., TDRA table #B2
  • the number of candidate PDSCH reception occasions in a slot of the first set of slots may be equal to a number of non-overlapped SLIVs in the first TDRA table.
  • the number of candidate PDSCH reception occasions in a slot of the second set of slots may be equal to a number of non-overlapped SLIVs in the second TDRA table.
  • FIG. 5 illustrates a flow chart of an exemplary procedure 500 for wireless communications in accordance with some embodiments of the present disclosure. Details described in all of the foregoing embodiments of the present disclosure are applicable for the embodiments shown in FIG. 5.
  • the procedure may be performed by a BS, for example, BS 102 in FIG. 1.
  • a BS may indicate that HARQ-ACK feedback for a PDSCH on each candidate PDSCH reception occasion of a first plurality of candidate PDSCH reception occasions (e.g., candidate PDSCH reception occasions #A1 or candidate PDSCH reception occasions #A2) and HARQ-ACK feedback for a PDSCH on each candidate PDSCH reception occasion of a second plurality of candidate PDSCH reception occasions (e.g., candidate PDSCH reception occasions #B1 or candidate PDSCH reception occasions #B2) are to be multiplexed in a PUCCH in a first slot (e.g., slot #U1 or slot n+4 in FIG. 2) .
  • a first plurality of candidate PDSCH reception occasions e.g., candidate PDSCH reception occasions #A1 or candidate PDSCH reception occasions #A2
  • HARQ-ACK feedback for a PDSCH on each candidate PDSCH reception occasion of a second plurality of candidate PDSCH reception occasions e.g., candidate PDSCH reception occasions #B1 or
  • the PDSCH on each candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions may be scrambled by a first RNTI specific to a UE (e.g., C-RNTI) and the PDSCH on each candidate PDSCH reception occasion of the second plurality of PDSCHs may be scrambled by a second RNTI common to a group of UEs including the UE (e.g., G-RNTI for multicast) .
  • the BS may receive the PUCCH in the first slot.
  • the first plurality of candidate PDSCH reception occasions may be included in a first set of slots (e.g., slot set #A1 or slot set #A2) and the second plurality of candidate PDSCH reception occasions are included in a second set of slots (e.g., slot set #B1 or slot set #B2) .
  • the first set of slots may be determined based on a first HARQ-ACK feedback timing set (e.g., K1 set #A1 or K1 set #A2) configured for the first plurality of candidate PDSCH reception occasions and the second set of slots is determined based on a second HARQ-ACK feedback timing set (e.g., K1 set #B1 or K1 set #B2) configured for the second plurality of candidate PDSCH reception occasions.
  • a first HARQ-ACK feedback timing set e.g., K1 set #A1 or K1 set #A2
  • K1 set #B1 or K1 set #B2 e.g., K1 set #B1 or K1 set #B2
  • the BS may determine a candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions in the slot according to a first TDRA table (e.g., TDRA table #A1 or TDRA table #A2) configured for the first plurality of candidate PDSCH reception occasions.
  • a first TDRA table e.g., TDRA table #A1 or TDRA table #A2
  • the BS may determine a candidate PDSCH reception occasion of the second plurality of candidate PDSCH reception occasions in the slot according to a second TDRA table (e.g., TDRA table #B1 or TDRA table #B2) configured for the second plurality of candidate PDSCH reception occasions.
  • TDRA table 320 or TDRA table 330 one candidate PDSCH reception occasion may be determined for the slot.
  • two candidate PDSCH reception occasions may be determined for the slot.
  • the BS may determine a candidate PDSCH reception occasion in the slot according to a union of the first and second TDRA tables (e.g., TDRA table union 340 in FIG. 3A) .
  • the BS may determine a candidate PDSCH reception occasion according to a union of the first and second TDRA tables by: in response to a number of non-overlapped SLIVs in the union of the first and second TDRA tables being equal to 1 or the UE supporting receiving a maximum of one PDSCH per slot, determining two candidate PDSCH reception occasions in the slot (e.g., slot #M1) included in both the first and second sets of slots. For example, referring back to FIG. 3A, according to TDRA table union 340, two candidate PDSCH reception occasion may be determined for the slot.
  • One (e.g., candidate PDSCH reception occasion #1) of the two candidate PDSCH reception occasions may be included in the first plurality of candidate PDSCH reception occasions and the other (e.g., candidate PDSCH reception occasion #2) of two candidate PDSCH reception occasions may be included in the second plurality of candidate PDSCH reception occasions.
  • the BS may determine a candidate PDSCH reception occasion according to a union of the first and second TDRA tables by: in response to a number of non-overlapped SLIVs in the union of the first and second TDRA tables being equal to 1 or the UE supporting receiving a maximum of one PDSCH per slot, determining a single candidate PDSCH reception occasion in the slot (e.g., slot #M1) included in both the first and second sets of slots.
  • a single candidate PDSCH reception occasion may be determined for the slot.
  • the single candidate PDSCH reception occasion may be included in either the first plurality of candidate PDSCH reception occasions or the second plurality of candidate PDSCH reception occasions.
  • the BS may transmit a single PDSCH scrambled by the first RNTI in the slot included in both the first and second sets of slots.
  • the PUCCH may carry a HARQ-ACK information bit (s) for the single candidate PDSCH reception occasion.
  • the BS may transmit a single PDSCH scrambled by the second RNTI in the slot included in both the first and second sets of slots.
  • the PUCCH may carry a HARQ-ACK information bit (s) for the single candidate PDSCH reception occasion.
  • the BS may transmit no PDSCH in the slot included in both the first and second sets of slots.
  • the PUCCH may carry a NACK bit (s) for the single candidate PDSCH reception occasion.
  • the PUCCH may carry a first HARQ-ACK codebook (e.g., HARQ-ACK codebook #A1 or HARQ-ACK codebook #A2) for the first plurality of candidate PDSCH reception occasions and a second HARQ-ACK codebook (e.g., HARQ-ACK codebook #B1 or HARQ-ACK codebook #B2) for the second plurality of candidate PDSCH reception occasions.
  • the first HARQ-ACK codebook may be arranged in front of the second HARQ-ACK codebook in the PUCCH.
  • the second HARQ-ACK codebook may be arranged in front of the first HARQ-ACK codebook in the PUCCH.
  • the PUCCH may carry a HARQ-ACK codebook including a HARQ-ACK information bit (s) for each candidate PDSCH reception occasion in either the first plurality of candidate PDSCH reception occasions or the second plurality of candidate PDSCH reception occasions.
  • the HARQ-ACK information bits for the candidate PDSCH reception occasions among the first set of slots and the second set of slots in the HARQ-ACK codebook are arranged according to an order (e.g., an ascending or descending order) of the candidate PDSCH reception occasions in the time domain or a predefined rule.
  • the HARQ-ACK information bits for the candidate PDSCH reception occasions are arranged according to an order of slot indexes of the candidate PDSCH reception occasions.
  • the HARQ-ACK information bit (s) for the first candidate PDSCH reception occasion may be arranged in front of the HARQ-ACK information bit (s) for the second candidate PDSCH reception occasion in the HARQ-ACK codebook.
  • the HARQ-ACK information bit (s) for the second candidate PDSCH reception occasion may be arranged in front of the HARQ-ACK information bit (s) for the first candidate PDSCH reception occasion in the HARQ-ACK codebook.
  • the BS may determine a candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions (e.g., candidate PDSCH reception occasions #A2) in each of the first set of slots (e.g., slot set #A2) according to non-overlapped SLIVs in a first TDRA table (e.g., TDRA table #A2) configured for the first plurality of candidate PDSCH reception occasions.
  • a candidate PDSCH reception occasion of the first plurality of candidate PDSCH reception occasions e.g., candidate PDSCH reception occasions #A2
  • the first set of slots e.g., slot set #A2
  • TDRA table #A2 e.g., TDRA table #A2
  • the BS may further determine a candidate PDSCH reception occasion of the second plurality of candidate PDSCH reception occasions (e.g., candidate PDSCH reception occasions #B2) in each of the second set of slots (e.g., slot set #B2) according to non-overlapped SLIVs in a second TDRA table (e.g., TDRA table #B2) configured for the second plurality of candidate PDSCH reception occasions.
  • a candidate PDSCH reception occasion of the second plurality of candidate PDSCH reception occasions e.g., candidate PDSCH reception occasions #B2
  • a second TDRA table e.g., TDRA table #B2
  • the number of candidate PDSCH reception occasions in a slot of the first set of slots may be equal to a number of non-overlapped SLIVs in the first TDRA table.
  • the number of candidate PDSCH reception occasions in a slot of the second set of slots may be equal to a number of non-overlapped SLIVs in the second TDRA table.
  • FIG. 6 illustrates a block diagram of an exemplary apparatus 600 according to some embodiments of the present disclosure.
  • the apparatus 600 may include at least one non-transitory computer-readable medium 601, at least one receiving circuitry 602, at least one transmitting circuitry 604, and at least one processor 606 coupled to the non-transitory computer-readable medium 601, the receiving circuitry 602 and the transmitting circuitry 604.
  • the apparatus 600 may be a base station side apparatus (e.g., a BS) or a communication device (e.g., a UE) .
  • the at least one processor 606, transmitting circuitry 604, and receiving circuitry 602 are described in the singular, the plural is contemplated unless a limitation to the singular is explicitly stated.
  • the receiving circuitry 602 and the transmitting circuitry 604 are combined into a single device, such as a transceiver.
  • the apparatus 600 may further include an input device, a memory, and/or other components.
  • the non-transitory computer-readable medium 601 may have stored thereon computer-executable instructions to cause a processor to implement the method with respect to the UEs as described above.
  • the computer-executable instructions when executed, cause the processor 606 interacting with receiving circuitry 602 and transmitting circuitry 604, so as to perform the operations with respect to the UEs described in FIGS. 1-5.
  • the non-transitory computer-readable medium 601 may have stored thereon computer-executable instructions to cause a processor to implement the method with respect to the BSs as described above.
  • the computer-executable instructions when executed, cause the processor 606 interacting with receiving circuitry 602 and transmitting circuitry 604, so as to perform the operations with respect to the BSs described in FIGS. 1-5.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • the operations or steps of a method may reside as one or any combination or set of codes and/or instructions on a non-transitory computer-readable medium, which may be incorporated into a computer program product.
  • the terms “includes, “ “including, “ or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
  • An element proceeded by “a, “ “an, “ or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.
  • the term “another” is defined as at least a second or more.
  • the term “having” and the like, as used herein, are defined as "including.
  • Expressions such as “A and/or B” or “at least one of A and B” may include any and all combinations of words enumerated along with the expression.
  • the expression “A and/or B” or “at least one of A and B” may include A, B, or both A and B.
  • the wording "the first, " “the second” or the like is only used to clearly illustrate the embodiments of the present application, but is not used to limit the substance of the present application.

Abstract

Des modes de réalisation de la présente invention concernent la détermination de livre de codes HARQ-ACK. Selon certains modes de réalisation de l'invention, un procédé peut comprendre : la détermination qu'une rétroaction HARQ-ACK pour un PDSCH sur chaque occasion de réception PDSCH candidate d'une première pluralité d'occasions de réception PDSCH candidates et une rétroaction HARQ-ACK pour un PDSCH sur chaque occasion de réception PDSCH candidate d'une seconde pluralité d'occasions de réception PDSCH candidates doivent être multiplexées dans un PUCCH dans un premier créneau, le PDSCH sur chaque occasion de réception PDSCH candidate de la première pluralité d'occasions de réception PDSCH candidates étant mélangé par un premier RNTI spécifique à l'UE et le PDSCH sur chaque occasion de réception PDSCH candidate de la seconde pluralité de PDSCH étant mélangé par un second RNTI commun à un groupe d'UE comprenant l'UE ; et la transmission du PUCCH dans le premier créneau.
PCT/CN2021/093045 2021-05-11 2021-05-11 Procédé et appareil de détermination de livre de codes harq-ack de type 1 WO2022236673A1 (fr)

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EP21941249.1A EP4338435A1 (fr) 2021-05-11 2021-05-11 Procédé et appareil de détermination de livre de codes harq-ack de type 1
CN202180097432.7A CN117242797A (zh) 2021-05-11 2021-05-11 用于类型1 harq-ack码本确定的方法及装置
PCT/CN2021/093045 WO2022236673A1 (fr) 2021-05-11 2021-05-11 Procédé et appareil de détermination de livre de codes harq-ack de type 1

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